You're missing the point entirely. It's not about the difficulty in making a change or a repair. It's about liability. If you hire a locksmith, then you have r

You're missing the point entirely. It's not about the difficulty in making a change or a repair. It's about liability. If you hire a locksmith, then you have reason to believe that someone was professionally trained to fix the issue at hand. They may not do it any better nor faster, but their job title implies that they know what they are doing by the book. A DIYer doesn't have that same set of credentials. You could be better than any locksmith in your town, but you're still considered a hobbyist